OSIRIS-REx has spent almost two years circling near-Earth asteroid Bennu. Tomorrow, it swoops in to scoop up a sample. But Bennu has turned out to be more complicated than we expected. Thanks to laser altimetry data and high-resolution imagery from OSIRIS-REx, we can take a tour of Bennu’s remarkable terrain. When NASA's OSIRIS-REx Asteroid Sample Return Mission arrived at asteroid Bennu in December 2018, its close-up images confirmed what mission planners had predicted nearly two decades before

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